Week 5 Part 2 Review

What is the relationship between acid strength and pKa?

What is the relationship between acid strength and pKa?

the stronger the acid, the smaller the pKa

What is the relationship between base strength and pKb?

the stronger the base, the smaller the pKb

characterstics of neutral solution

concentrations of H+ and OH- are same, [H+]=1x10^-7, pH=7

characterstics of acidic solution

concentrations of H+ greater than OH-, [H+]>1x10^-7, pH<7

characteristics of basic solution

concentrations of H+ less than OH-, \[H+\]

How are pKa and pKb related?

at 25c pKa + pKb = 14

How do you find concentration of [OH-]?

pOH=-log(OH-)

How do you find concentration of [H+]?

pH=-log(H+)

What is percent ionization? What is the trend?

[H+]/[HA]x100, at lower concentrations weak acids can become fully ionized because weak acidity means theres more reactant, so it will shift to products, so more ions

pKa expression

pKa=-log(Ka)

pKb expression

pKb=-log(Kb)